Lumps on my body

So long story short, I’ve been getting lumps occasionally in different places, they don’t seem to hurt until I find them, or notice. The first one was in between my boobs, a bit larger then a marble I’d say, they hurt a little bit, moveable, it was like 5 months ago probably but went away within a few weeks, then there was one on my stomach, went away, and a month or so ago there was one right beside or basically on the side of my belly button, it hurt to stay on my side with that one, it was hard feeling ( again like a marble) , I think it’s still there but slightly hard to find. Most the time they go away and pop up somewhere else, and don’t cause much of an issue besides tiny pain. But now there’s one on my left underarm, which I didn’t notice until today when I put deodorant on and saw a swollen dot, I think it’s bigger, and it hurts more, does anyone know what the heck these things are !? It’s been driving me nuts and I’ve been trying to rule out whether it’s a cyst or what, and I hate doctors, because It’s not a huge issue I’m not gonna go, but the weird places they pop up, leave, go to a different one is bothering me. Any info ?? * all thoughts appreciated *